| Company | Timeline | Status | |
| Railmeasurement Limited Secretary • Co Secretary | 1 Dec 2006←2 Years 4 Months→31 Mar 2009 | Active | |
| Stuart Grassie Engineering Limited Secretary • Company Secretary | 1 Apr 2005←4 Years→1 Oct 2009 | Active | |
| Bakerail Services Limited Secretary • Unreported | 11 Oct 2000←21 Years→19 Jul 2022 | Dissolved | |
